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Caliciopsis Pine Canker (Caliciopsis pinea)

 

 

 

Caliciopsis pine canker was first reported in New Hampshire in 1997. Most commonly it is found on Pinus strobus (white pine) in New England, New York, Virginia, West Virginia, Quebec and Ontario, but has also been reported on P. rigida, P. pungens, P. echinata, P. virginiana in North America, and was first found on P. resinosus (red pine) in New Hampshire in 2012. It has also been reported in Europe on P. pinaster and P. radiata and in Germany on P. pumilo and Abies species.

Pine Canker Pitch Streaks

 

Caliciopsis canker is described in literature as a weak perennial fungus which attacks thin barked areas of the branch and bole. Cankers can be either elongated depressions with profuse pitching on the stem or an extreme roughening of the bark just below the branch whorls. Black hair like fruiting structures persist throughout the year and the spores mature in late winter and spring. Spores are disseminated by wind and rain and typically enter through bark lenticels or small insect wounds. The highest incidence of disease to date has been noted on suppressed, understory trees and trees in very dense stands. Management practices which create increased sunlight in the stand may decrease spore production and dissemination.

 

Pest Alert

 

Research Publications:
Extent and Severity of Caliciopsis Canker in New England, USA: An Emerging Disease of Eastern White Pine (Pinus strobus L.). Forests 2015, 6, 4360-4373.

Soil and Stocking Effects on Caliciopsis Canker of Pinus strobus L. Forests 2016, 7(11), 269.